injector warranty - 2005 Expedition, any experience?

Yeah, I was going to do the fuel filter anyway and it is due for plugs as well. Would not surprise me if a coil or two was weak as well. I may just replace all the coils and plugs myself. If you seafoam the **** out of it and use an impact driver to bust them loose you rarely break one of the crappy two piece plugs it came with. If I do break one I will get one of the extractor kits. The dealer used to charge $800 just to change plugs but that may have gone down now.